Ar'non. (roaring). The river or torrent which formed the boundary between Moab and the Amorites, on the north of Moab, Numbers 21:13-14; Numbers 21:24; Numbers 21:26; Judges 11:22, and afterwards between Moab and Israel (Reuben). Deuteronomy 2:24; Deuteronomy 2:36; 3:8; Deuteronomy 3:12; Deuteronomy 3:16; Deuteronomy 4:48; Joshua 12:1-2; Joshua 13:9; Joshua 13:16; Judges 11:13; Judges 11:26. There can be no doubt that the Wady el-Mojeb of the present day is the Arnon. Its principal source is near Katrane, on the Haj route.